Automatic work feeding attachment for drill presses



July 10,' 1945. o. c. KAVLE 2,380,314

AUTOMATIC WORK FEEDING ATTACHMENT FOR DRILL PRESSES Fi-led Aug. 13, 19422 Sheets-Sheet l I l 3 I I l I l A 1J1 I I 20 Fla. 2 1 i 33 32 6 a 30 gl I 1* v34 :0 34, 7 as VJ q 7 v INVENTOR."

FIG

ATTORA/t YS,

y 0,1945. on c KAVLE 2,380,314

AUTOMATIC WORK FEEDING ATTACHMENT FOR DRILL Ph ESSES & 4

H I 38 I I I Q a9 l 39 3e 37 FIG}? INVENTOR.

ZQFMAZZW the views.

Patented July 1 0,

D scar C. Kavle, Syrac use, NQYL, assignor to The I "Kayle-Had('Jorp'oration, Ithaca, N. Y., a corporati'o n of New York .t vApplication August 13, 1942, Serial No. 454,717 rol m. (01.17-22) Thisinvention has for-its object an automatic work feeding attachment fordrillpresses, by

which the operator merely places the-work-pieceson a work carriage andremoves the finishedrwork therefrom, and the carriage isautomaticallyactuated to carry the work-pieces successively to the tool and in whichworkholders carried by the carriage are automatically moved; tocarry thework to and from; the tool 'when in line there- With. v 1

The invention has further for its-obiect such an attachment-which canreadily be attached to the head or quill of a drill-press. i r ,1

Other objects appear throughout the specification. l

The invention consistsain the -novel, features and in the combinationsand constructions here inafter set 'forth andclaimed In describing thisinvention, referencegisl had 'to the accompanyingdrawings, in whichlikecharacters designate corresponding parts in 'all- Figure -1:

the drill press being also shown.

Figurel. v I

Figure-3 isa plan view of theframe and base of-the'attachment. q iFigure 4 is a sectional view taken approximately on line 4-4,v Figure-3,parts being omitted" Figure 5 is an enlarged: fragmentary sectional viewof the pivot and contiguous parts for the indexing pawl shown in Figures3-and 4. e

Figure 6 is a fragmentary-view; i-llustrating a, slightly modified =toolarrangement from that shown in Figure is, a longitudinal ecti al Anewthrough this attachment, contiguous vportions ofi Figure 2 is anelevation looking-tothe left-in timing the operation of the holder-sinline with the tool to feed the work to and from thetool. The inventionalsoinc'ludes strippers forstripping the work off from the toolduringdownward or retrograde movement of theworkjholder.

a rack on the headll. The lever 31in the drill press is usually used tofeed the head, and the drill or tool up and down or fromandto the workon the drill press table. ,1 g I '6 designates the base of theattachment, this being mounted on a plate 1, which in turn may besecured to the'table. 8 designates a frame rise ing fromthe base, thisconsisting of two standardsj of rods, and 9 is a head carried at'theupper (ends of the rods and adjustable; along the same,

This automatic work feeding attachment-for drill presses comprisesgenerally, a .base mount- I able upon the table of a drill press, a workcarriage,- as a-tu-rret, rotatablymounted 0n the base 1 and havingaseries of vertically movable work holders mounted therein and movable tocarry the work toward and from the tool; a frame mounted on the base andhaving a headprovided; with means for attachment to the quill of thedrill press, an abutment carried by the frame and against which the workis fed by the holders, the head having means for rotatably supportingthe tool and holding it from, axial movement, means for transferring therotary movement of the spindle of the drill press to the tool, and meansfor intermittently actuating and indexing the work carriage to bring thework holders successively the head being secured in any adjustedposition, as by set screws to. The head includes apart,

as a sleeve ll, havingsplit clamp means I2 at its'upper end forsecurement tothefquill 2' of thedrill'press; This head also comprisesmeans bywhich the rotary motion of the spindle 13' of thedril l' pressis transferred to the tool or tools. In theillustrated embodiment of theinvention, two tools are shown, and the means for trans- -ferring themotion ofthespindle ['3 to the tools is of the multiple typeeon'sisti'ngofa shank having an' annular head [Shaving internal gearteethjmeshing with pinionsjlli' on spindlesjl mounted in. the head,these spindles beingpro- I vided with chucks or sockets t8 forre'ceivingthe,

20 designates thework carriage here shown as a turret, movable'about ahorizontal. axis and provided with an annular series of work holders,

as plungers 2|, movable upwardly or parallel to the axis of rotation ofthe carriage 2|] guides;

The carriage 2 0 is mou'nted about, an up-v right'shaft 22 above thebase 6 andextending through the base, 6 for connection to indexingmechanism-Qwhich intermittently .actuates the carriage. 23 designates acarriage mounted on the frame or the rods 8 and having abutments 24against which the work-pieces are held during the machining operation.The tools l9 extend throughthe abutments 24. Spring, means is providedfor applying yielding pressure between the workpiece Hltl and theabutment. As here illustrated, the carriage 23 i yieldingly mounted onin line with the tool and for reciprocating and the frame or rods 8toyield against the pressure of springs 25, as the work-pieces Hill arelifted by the plungers 2| and fed to the tools l9.,

26 designates spring-pressed strippers, one for each abutment 24 forpressing the work-piece away from the abutment during downward orretrograde movement of the plungers 2|. Owing to the pressure of thesprings 25, the work-pieces are held from rotation with the tool, byreason of their frictional engagement with the abutment. The plungersare provided with suitable clearances or depressions for the ends of thetools, after the tools have cut through the work-piece. In Figure 1, onetool is shown, as a drill, and the other as a reamer. In Figure 6, bothtoolsare shown as drills operating on one work-piece IIJI. Thus, thetools may be of the same or of difierent character.

In the form shown in Figure l, the indexing mechanism is such that thework carriage 20, when fed one step, carries the work-piece I under thedrill and the work-piece I00 that was previously under the drill underthe reamer. In the form shown in Figure 6, the indexing mechanism willbe of such extent as to carry the workpiece I0! under the two drillsduring each intermittent action.

The means for actuating and indexing the work carriage may be of anysuitable construction and includes a motor actuated shaft 21 mounted inthe'base 6, motion transmitting means between this shaft and theplungers or work holders 2| positioned in line with or in juxtapositionto the tool or tools I9, and also motion transmitting mechanism betweenthe shaft 21 and an indexing pawl 28 coacting with notches 29 formed inthe periphery of the carriage or turret 2B.

30 designates the motor, which is connected to the shaft 21, it beinghere shown as connected directly thereto but may beconnected theretothrough reduction gearing. The motion transmitting means between theshaft 21 and the work holders or plungers 21 in juxtaposition to thetools includes a cam 3| mounted on the shaft 2! within the base 6 and aplunger 32 having a head 33 for thrusting against the lower ends of theplungers 2| in juxtaposition to the tools. The plunger 32 extendsthrough a suitable guide in the base 6 to above the same and is providedwith a follower, as a roller 34, at its lower end for coacting with thecam 3 l The motion transmitting means between the shaft 21 and theindexing pawl 28 is here shown as a connecting rod 35 mounted at one endon the crank at 36 at the inner end of the shaft 21 and its other end at3! to a rock arm on the shaft 22 extending through the base 6coaxiallywith the work carriage or turret, an arm 38 mounted on the rock shaftand extending radially relatively to the carriage 20 and having anupwardly extending arm 39 at its outer end extending crosswise of theperiphery of the carriage 20 and on which is mounted the pawl 28. Theindexing mechanism further includes a spring-pressed stop pawl 40 forcoacting with any one of the notches 29 after the carriage 20 has beenindexed. The cam 3| is of such form, as seen in Figure 2, that theplungers in juxtaposition to the tools are lifted quickly against theabutment 24 and held against the same while a high dwell surface 4| ofthe cam is coacting with the follower 34. During this period, theconnecting rod 35 is moving the pawl 28 in a retrograde direction from apoint between two of the notches 29, that is, to the right in Figure 2,and enters the notch at the end of its throw, then reverses and feedsthe carriage one step, and then returns it to its position between twoof the notches. When the carriage has been fed one step, the pawl 40enters another of the notclies and holds the carriage in its indexedposition. While the carriage is indexing, the follower is coacting withthe low surface 42 of the cam. The lifts and drops between the low andhigh surfaces 4| and 42 of the cam are abrupt or steep toeffect quicklifting of the work holders 2| against the abutments 24 and a quickreturn of the work holders away from this position to retraced position.

When the two tools are of different character, as a drill and a reamer,as shown in Figure 1, the throw of the pawl 28 and the spacing of thenotches 29 is such as to feed one work holder or plunger under the drillupon one operation, and then feed that work holder or plunger under thereamer, and another work holder or plunger under the drill upon the nextoperation.

The pawl 28 is here shown as mounted upon a pin 43 extending into theupwardly extending arm 39 and being cupped out to receive a spring 44coiled about the pin and anchored at one end in the bottom of thecup-shaped part and at its other end to a cap 45 secured to the pin 43.

In the general operation, the base 6 is secured to the table of thedrill .press and the head ll to the quill and also adjusted to thedesired height along the frame or rods 8. As the turret rotates, thefinished work is removed and the new work placed on the holder 2|, asthese holders move around to the operator during the indexing operationand the new work carried to the tools and the tooling operationsperformed automatically. What I claim is:

The-combination with a machine having an overhanging upright quill, awork table, and a rotating spindle extending vertically of the quillbeyond the lower end of the same, of a multiple tool unit including aframe having a head provided with a sleeve portion and enclosing thelower end of the quill and secured thereto and also enclosing thespindle, a base mountable on the table and on which base the frame issupported, multiple drill supporting and driving mechanism mountedwithin the head and ineluding a shank for attachment to the spindle,

